Estimate the values of the following expressions by rounding off the numbers to 1 significant figure.
(a) 431 027+25 -4311+8921=
(b) 253.471+166.205-213.99=
(c) 9.872-13.952=
State the number of significant figures in 21 000 if it is corrected to
(a) the nearest integer
(b) the nearest ten
(c) the nearest thousand
我想知點做= = 21000好似冇得再corrected喎
有冇人可以幫下手呀
最好講雨點解啦
F.2數學 significant figures
2010-08-28 6:56 pm
回答 (1)
2010-08-28 7:08 pm
✔ 最佳答案
a)431027 + 25 - 4311 + 8921
= 400000 + 30 - 4000 + 9000
= 405030
b)
253.471 + 166.205 - 213.99
= 300 + 200 - 200
= 300
c)
9.872 - 13.952
= 10 - 14
= -4
冇得再corrected
a) 2
b) 2
c) 2
參考: My Maths Knowledge
收錄日期: 2021-04-23 22:48:53
原文連結 [永久失效]:
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